We know that it is not easy to cultivate the industry, and seek the prosperity of the aquatic industry. Not misleading, not exaggerating, not hyping, not headlined the party. With the context of breeders, let you enjoy a fine product in a short period of time!
First, the identification of male and female salamander (baby fish).
The distinction between male and female salamanders is mainly based on the characteristics of the cloaca, especially during the reproductive season. During the breeding season , the cloaca glands of male salamanders are plump , large bean-shaped , forming a raised longitudinal elliptical ring , very distinct , enveloping the cloacas , and a circle of irregular fleshy small protrusions on the outer edge of the cloaca. Female giant salamander reproductive foramen are mostly round, the pore size is relatively small, there are no white protrusions on both sides of the genital foramen, the outer edge of the hole is smooth, and the cortical layer on both sides of the inner edge can be seen to form a wrinkle protruding to the cavity surface. During the non-breeding period, the cloaca of male and female salamanders is not very different, nor is it easy to distinguish. Dissecting the area around the cloacatomer found that there is a pair of valvular glands under the skin at the male bulge, the cloaca gland, while the female has a small amount of subcutaneous around the cloaca foramen.
1. Characteristics of female cloaca
2. Characteristics of the cloaca of male salamander
(1). The male cloaca is slightly smaller, and the surrounding convexity forms an oval-shaped bulging circle; Female cloacass is large and concave inwards around it.
(2). There is an irregular circle of small white dot protrusions outside the male cloaca, and there is no small white dot protrusion outside the female cloaca.
(3). After dissection, it can be seen: male cloaca has two apricot-yellow cloaca glands under the inner skin of the cloaca, surrounded by an oval shape, and the glands can secrete a gelatinous mucus, and the females do not have this gland.
Second, stimulate the juvenile turtle shell method
Hatching at room temperature requires a cumulative temperature of about 36,000 °C hours, incubation time of 65 to 75 days, and often some turtle eggs can not produce turtles in time. In production, the hatchling turtle can be artificially triggered to grow synchronously and improve the survival rate of the juvenile turtle.
1. Turn the sand at the right time
When the incubation reaches the accumulated temperature demand, a small number of juvenile turtles out of the shell, the egg with a spawning time difference of 3 days to 5 days can be a batch, gently turn the sand for incubation, and place the turtle eggs on the sand for 10 minutes to 15 minutes, and soon a large number of juvenile turtles will break out of the shell. Unshelled turtle eggs can still be placed back in the sand to continue hatching.
2. Sun exposure
This method applies to the end of September to mid-October in the late incubation period. The incubator containing the turtle eggs is exposed to the sun for 2 to 4 hours, which can prompt a large number of juvenile turtles to emerge from their shells. This method can be used 3 to 5 times repeatedly.
3. Soak in warm water
The turtle eggs that are close to the accumulated temperature are soaked in warm water of 20 ° C ~ 30 ° C for 5 minutes to 10 minutes, and the water body is suitable for just submerging the turtle eggs. This method can promote a large number of juvenile turtles out of their shells, and the unbroken turtle eggs can still be put back into the sand to continue hatching.
4. Heat up appropriately
This method is used in farms (households) without constant temperature facilities, and every night, the hatchery box is wrapped with plastic paper, leaving 4 to 5 breathable holes, which can increase the night temperature, reduce the temperature difference between day and night, shorten the incubation time, and promote the early hatching of juvenile turtles.
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